Apply for a tourist visa while I-130 petition is pending?

Technically yes, but practically not in your situation.

What to do with my I-130 case?!

Looks like your younger one should get it under CSPA. For the other, you will have to file a new application, as he seems to be beyond CSPA reach....

Do you have the receipt notice? You may be able to use that and explain that you lost your approval notice.

My OPT was denied, is it better to reopen or start a new application?

Chances depend on facts. We don't know what you submitted originally and why it was denied. I hope, though, you are wise enough not to do this on...

Which name should I apply for my green card with?

I generally suggest married name, but put your maiden name as "other names used" so there's no conflict

Can i reply to my i485 rfe on my own? Do i still have to send it via the company lawyer?

If you don't wish to work with the company lawyer, consider your own independent attorney. Documents like marriage and birth certs should be...

Interview for Green card

I actually recommend photocopies (on a regular sized paper) of your photos documenting where and when they were taken and who is in the pictures,...

Can i Apply for citizenship I have a misdeminor?

Drug crimes are pretty negatively viewed for immigration purposes. I wouldn't risk a naturalization application. If the n400 gets denied, your...

Time to call an immigration attorney as your time available for an MTR is very limited.

Can I apply for citizenship?

No, you cannot apply for citizenship. It really sounds like you received a 2 year conditional green card and failed to remove conditions. That's a...